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CONTAP-618017: Container Block Reclamation scanner makes no progress

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Issue

  • Delayed free footprint remains >= 2%, for example:
    ::> volume show-footprint -fields delayed-free-footprint, delayed-free-footprint-percent
    vserver volume delayed-free-footprint delayed-free-footprint-percent
    -------- ------ ---------------------- ------------------------------
    MySVM MyVOlume 1.04TB 2%


  • The default options to trigger the block reclamation scanner are not changed and are default 1% and 2%:
    ::> node run -node local -command options wafl.df
    wafl.df.max.percent 2 (value might be overwritten in takeover)
    wafl.df.wm.percent 1 (value might be overwritten in takeover)


  • When tracking the delayed free usage per-volume over time, if increases >2% but never goes below <2%, for example:
    2025/12/12 Delayed Frees 1.63TB 3%
    2025/12/14 Delayed Frees 972GB 2%
    2025/12/16 Delayed Frees 988GB 2%
    2025/12/18 Delayed Frees 1001GB 2%
    2025/12/21 Delayed Frees 1009GB 2%
    2025/12/28 Delayed Frees 1013GB 2%
    2026/01/04 Delayed Frees 1014GB 2%
    2026/01/07 Delayed Frees 3.95TB 7%
    2026/01/18 Delayed Frees 1.04TB 2%

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